Holder for photographic plates



May-26, 1925.

1,539,639 L. c. BRUCKER HOLDER FOR FHOTOGRAPHIC PLATES Filed on. -15,1925 ATTORNEY Patented May 26,1925.

UNITED STATES PATENT 1 OFFICE.

LEOPOLD C. BRUCKER, NEW YORK, N. Y.

i HOLDER FOR PHGTOGRAPHIC PLATES.

Application filed October 15, 1923. Serial No. 668,873.

To all 2071022 it may concern? Be it known that I, LnoroLn C. BnUoKnn, acitizen of the United States, residing at New York city, in the countyof New York and State of New York, have invented new and usefulImprovements in Holders for Photographic Plates, of which the followingis a specification.

This invention relates to holders for photographic plates and hasparticular reference to a holder for the "reception of a negative platewhereby the plate may be given its bath ina chemical solution, withoutrequiring the hands to touch the solution during the developing processafter the plate has been placed in the holder.

Another object of the invention is to provide a holder of the classmentioned where in the negative plate may be rocked to cause thesolution to pass back and forth over the plate during the developingprocess.

A still further object of the invention is to prouide a holder forphotographic plates which is simple in construction, cheap ofmainifactnrc and easy of operation.

Vith these and other objects in view, the invention resides in certainnovel construction and combination andarrangement of parts, theessential features of which are hereinafter fully described, areparticularly pointed out in the appended claims, and

are illustrated in the accon'i ninying drawing, in which a I Figure 1 isa perspective view of my invention per se.

Figure 2 is a longitudinal sectional view therethrough showing themanner of sup-- porting a photographic plate.

Figure S5 is a transverse sectional view on the line 3-3 of Figure 2.

Figure 4: is a detail perspective view of a clamping device for use inthe developing oti photographic paper film.

In the process of developing the photographic plates or film, it hasbeen the practice of passing the negatives through a chemical bath,which requires the hands of a person to grasp the plate and dip the samein the solution and at the same time lmpart to the plate a rockingmovement so as to cause the solution to flow back and forth across thesurface of the plate. This has been found very objectionable for thereason that the chemical solution stains the hands, and also causesfinger print marks to show plate 14;.

on the plate after the sam'e'has been fully developed. My inventiontends to overcome these objections as will be seen as the nature of theinvention is better understood.

Referring more particularly to the drawing, the reference numeral 10designates a frame which in the present instance is shown as rectangularin configuration, but which may be of any suitable shape and size toaccon'nnodate various plates. The frame 10 is preferably made of arelatively light metal and is provided with a pair of upstanding sideflanges 11, 11 and an end flange 12. Only three sides of the frame areprovided at 13 for the insertion of a photographic The longitudinalflanges 11, ll serve as a guide for sliding the plate in the open end 13of the frame and the transverse flange acts as stop for limiting themovement of insertion. The flanges 11, 11 are formed with lips 15 whichprevent the plate .14 from lifting out of the frame. After the plate isinserted in the manner just descril'ied, the same is locked therein bymeans of a pivoted catch member 16 carried by the frame 10 at the openend 13 thereof. Secured to the underside of the frame are rockers 17which extend the full length of the same in a longitudinal direction andwhich support the frame 10 above the bottom of the pan in. which theframe is placed for the developing of the plate. In order to imparta.rocking movement to the frame through the rockers 17, I provide handles'18 at the opposite ends of the frame which extend a suitable distanceabove the frame so that the hands of the operator may be positioned asfar away as possible from contact with the solution to prevent the handsfrom becoming soiled.

From the foregoing description, it will be seen that the manner ofinserting the plate 14 has been clearly set forth, and when inserted andlocked, the holder is placed in the solution so as to permit the rockersto rest on the pan bottom after which a rocking movement is imparted tothe frame to cause the solution to flow back and forth across the platefor such time as is necessary to bring outthe exposure of the plate.

In Figure 4, I have shown a clamping member 20 consisting of identicalU-shaped sections 21 pivoted together as at 22, and adapted for use inthe developing of photoh flanges, which leaves one side open as i ingraphic out film. The holder of the type mentioned is provided andreceives a metal frame in the manner that it receives the photographicplate just described, after which the cut film is placed thereon and themember 20 applied so as to hold the film flat against the metal plateand in a locked condition as the sections 21 engage under the lips 15.

While I have described What I deem to be the most desirable embodimentof my invention, it is ob ions that many of the details may be 'ariedWithout in any way departing from the spirit of my inrention, and Itherefore do not limit myself to the exact details of constructionherein set forth nor to anything less than the whole of my inventionlimited only by the appended claims.

What is claimed as new is:

1. it holder for photographic plates comprising a frame, means forlocking a photographic plate in said frame, and substitute rockersdisposed beneath said frame.

2. A holder for photographic plates comprising a frame, means forlocking a photographic plate in said frame, and rocking means disposedbeneath said frame.

3. A holder for photographic plates comprising a frame having an openintherein for exposing both sides of the photographic plate, means on saidframe for locking the plate therein, and rockers mounted beneath saidframe and extending the length thereof.

at. A holder for photographic plates comprising a frame having anopening therein for exposing both sides of the photographic plate,.meanson said frame for locking the plate therein, and rockers mounted beneathsaid frame and extending the length thereof, and a handle formed at eachend of said frame whereby a rocking movement may be imparted to saidholders.

5. A holder for photographic plates comprising a frame, means forslidably receiving a photographic plate therein and for locking the sametherewith, and rockers secured toand extending the length of said frame.

In testimony whereof I have ailixed my signature.

LEOPOLD C. BRUCKE 2.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,539,639, granted May26, 1925, upon the application of Leopold C. Brucker, of New York, N.Y., for an improve ment in Holders for Photographic Plates, an errorappears in the printed specification requiring correction as follows:Page 2, line 23, claim 1, strike out the Word substitute; and that thesaid Letters Patent should be read with this correction therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 7th day of July, A. D. 1925.

[SEAL] WM. A. KINNAN,

A 02 131; Canton/65.950116?" 0 7 Patents Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,539,639, granted May26, 1925, upon the application of Leopold C. Brucker of New York, N. Y.,for an improvement in Holders for Photographic Plates, an error appearsin the printed specification requiring correction as follows: Page 2,line 23, claim 1, strike out the Word substitute; and that the saidLetters Patent should be read With this correction therein that the sameInav conform to the record of the ease in the Patent Office. H

Signed and sealed this 7th day of July, A. D, 1925.

[SEAL] WM. A. KINNAN,

Acting Commissioner of Patents"

